Vacuum-cleaner filter bag made from recycled plastics

Abstract

The invention relates to a vacuum cleaner filter bag comprising a wall which is made of an air-permeable material and surrounds an inner space, and an inlet opening introduced into the wall, wherein the air-permeable material comprises at least one layer made of a non-woven and/or a layer made of a fiber web, said non-woven and/or a fiber web comprising fibers or consisting thereof, which are made from a recycled plastic or a plurality of recycled plastics, wherein the recycled plastic or the plurality of recycled plastics comprise or are chemically recycled polypropylene.

1 . A vacuum cleaner filter bag comprising:
 a wall made of an air-permeable material surrounding an inner space; and   an inlet opening introduced into the wall, wherein the air-permeable material comprises at least one of a layer of a non-woven or a layer of a fiber web comprising fibers formed from one or more recycled plastics, and wherein the one or more recycled plastics comprise chemically recycled polypropylene.   
     
     
         2 . The vacuum cleaner filter bag according to  claim 1 , wherein the one or more recycled plastics is electrostatically charged. 
     
     
         3 . The vacuum cleaner filter bag according to  claim 1 , wherein the air-permeable material is a multi-layer structure, wherein at least two layers of the multi-layer structure comprise or are formed from at least one of a non-woven or a fiber web, wherein the non-woven or the fiber web includes fibers formed from one or more recycled plastics. 
     
     
         4 . The vacuum cleaner filter bag according to  claim 1 , wherein the air-permeable material comprises a capacity layer and a fine filter layer, wherein the capacity layer is a non-woven formed from staple fibers produced by an aerodynamic process, the staple fibers being formed from one or more recycled plastics, and wherein the fine filter layer is a meltblown non-woven made of electrostatically charged virgin PP, or is a meltblown non-woven made of bicomponent fibers with a recycled polyethylene terephthalate (rPET) or a recycled polypropylene (rPP) core and a sheath made of virgin polypropylene (PP) or virgin polymethylpentene (PMP), or is a support layer made of recycled plastic fibers with a layer of nano-fibers applied thereto. 
     
     
         5 . The vacuum cleaner filter bag according to  claim 1 , wherein the air-permeable material comprises: 
 at least one support layer and at least one fine filter layer, wherein one or more of the at least one support layer and/or one or more of the at least one fine filter layer includes one or more non-wovens formed from one or more recycled plastics;   at least one support layer and at least one capacity layer, wherein one or more layers of the at least one support layer are non-wovens and/or one or more layers of the at least one capacity layer include at least one of non-wovens or fiber webs formed from one or more recycled plastics; or   at least one support layer, at least one fine filter layer, and at least one capacity layer, wherein one or more layers of the at least one support layer, and/or one or more layers of the at least one fine filter layer include non-wovens formed from one or more recycled plastics and/or one or more layers of the at least one capacity layer include non-wovens or fiber webs formed from one or more recycled plastics.   
     
     
         6 . The vacuum cleaner filter bag according to  claim 5 , wherein at least one of:
 each support layer is a spunbond or scrim, having a grammage of from 5 to 80 g/m 2 , and/or having a titer of the fibers forming the spunbond or scrim in a range of from 0.5 dtex to 15 dtex;   the air-permeable material comprises 1 to 3 support layers, wherein when the air-permeable material comprises at least two support layers, a total grammage of a sum of all support layers is 10 to 240 g/m 2 ; or   all support layers are formed from a recycled plastic or a plurality of recycled plastics .   
     
     
         7 . The vacuum cleaner filter bag according to  claim 5 , wherein at least one of:
 each fine filter layer includes an extrusion non-woven, with a grammage of 5 to 100 g/m 2 ;   the air-permeable material comprises 1 to 5 fine filter layers, wherein when the air-permeable material comprises at least two fine filter layers, a total grammage of a sum of all fine filter layers is 10 to 300 g/m 2 ;   at least one of the fine filter layers is formed from one recycled plastic or a plurality of recycled plastics; or   at least one of the fine filter layers are electrostatically charged.   
     
     
         8 . The vacuum cleaner filter bag according to  claim 5 , wherein at least one of:
 each capacity layer includes at least one of a staple fiber non-woven, a fiber web, or a non-woven comprising dusty and/or fibrous recycled material from production of textiles, wherein each capacity layer has a grammage from 5 to 200 g/m 2 ; or   the air-permeable material comprises 1 to 5 capacity layers, wherein when the air-permeable material comprises at least two capacity layers, a total grammage of a sum of all capacity layers is 10 to 300 g/m 2  .   
     
     
         9 . The vacuum cleaner filter bag according to  claim 1 , wherein the air-permeable material is a multi-layer structure with a layer sequence as seen from an interior of the vacuum cleaner filter bag, the vacuum cleaner filter bag further comprising: 
 a support layer, at least one fine filter layer, and a second support layer; or   a support layer, at least one capacity layer, a second support layer, at least one fine filter layer, and a third support layer.   
     
     
         10 . The vacuum cleaner filter bag according to  claim 1 , wherein the vacuum cleaner filter bag comprises: 
 a retaining plate enclosing the inlet opening, the retaining plate being formed from or comprising one or more recycled plastics.   
     
     
         11 . The vacuum cleaner filter bag according to  claim 1 , wherein at least one of: at least one flow distributor or at least one diffuser is arranged in an interior of the vacuum cleaner filter bag, wherein the at least one flow distributor and/or the at least one diffuser is formed from one or more recycled plastics. 
     
     
         12 . The vacuum cleaner filter bag according to  claim 1 , wherein a proportion by weight of all recycled materials, relative to a total weight of the vacuum cleaner filter bag is at least 25%. 
     
     
         13 . The vacuum cleaner filter bag according to  claim 1 , wherein the vacuum cleaner filter bag is a flat bag, a block bottom bag, or a 3D bag. 
     
     
         14 . (canceled) 
     
     
         15 . A vacuum cleaner filter bag comprising:
 a wall formed from an air-permeable material surrounding an inner space;   an inlet opening formed in the wall;   a retaining plate enclosing the inlet opening; and   at least one of at least one flow distributor or at least one diffuser arranged in an interior of the vacuum cleaner filter bag;   wherein the air-permeable material includes at least one of a layer of non-woven or a layer of a fiber web comprising fibers formed from chemically recycled polypropylene.   
     
     
         16 . The vacuum cleaner filter bag of  claim 15 , wherein the chemically recycled polypropylene is electrostatically charged. 
     
     
         17 . The vacuum cleaner filter bag of  claim 15 , wherein the retaining plate and at least one of the at least one flow distributor or the at least one diffuser are formed from or comprise one or more recycled plastics. 
     
     
         18 . The vacuum cleaner filter bag of  claim 15 , wherein a proportion by weight of all recycled materials relative to a total weight of the vacuum cleaner filter bag is at least 95%. 
     
     
         19 . A vacuum cleaner filter bag comprising:
 a wall formed from an air-permeable material surrounding an inner space; and   an inlet opening formed in the wall;   wherein the air-permeable material is a multi-layer structure, wherein at least one layer of the multi-layer structure comprises a non-woven or a fiber web comprising fibers formed from one or more recycled plastics, and wherein the air-permeable material comprises a capacity layer and a fine filter layer.   
     
     
         20 . The vacuum cleaner filter bag of  claim 19 , wherein the capacity layer includes a non-woven formed from one or more staple fibers produced by an aerodynamic process, the one or more staple fibers being formed from one or more recycled plastics, and wherein the fine filter layer is a melt-blown non-woven made of electrostatically charged virgin polypropylene (PP) or is a melt-blown non-woven made of bi-component fibers with a recycled polyethylene terephthalate (rPET) or a recycled polypropylene (rPP) core, and a sheath made of virgin polypropylene (PP) or virgin polymethylpentene (PMP), or is a support layer made of recycled plastic fibers with a layer of nano-fibers applied thereto. 
     
     
         21 . The vacuum cleaner filter bag of  claim 19 , wherein the capacity layer includes at least one of a staple fiber non-woven, a fiber web, or a non-woven comprising dusty and/or fibrous recycled material from production of textiles, wherein the capacity layer has a grammage from 5 to 200 g/m 2 .